Journal
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
Volume 72, Issue 6, Pages 1781-1789Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2009.04.022
Keywords
Arsenic; Biomarkers; Lipid peroxidation; Mercury; Phytoaccumulation; Phytotoxicity; P. lentiscus; T. gallica; Total thiols
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Funding
- Spanish Ministry of Education and Science [CTM 2007-66401-CO2-02/TECNO, CTM 2005-04809/TECNO]
- Comunidad de Madrid [S-0505/AMB/0296]
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Hg and As resistance and bioaccumulation were studied in hydroponically grown Pistacia lentiscus and Tamarix gallica plants. Both elements caused growth inhibition in roots and shoots, with mercury showing greater phytotoxicity than arsenic. Accumulation of both elements by plants increased in response to element supply, with the greatest uptake found in T gallica. Both elements affected P and Mn status in plants, reduced chlorophyll a concentration and increased MDA and thiol levels. These stress indices showed good correlations with As and Hg concentration in plant tissues, especially in the roots. Toxic responses to mercury were more evident than for arsenic, especially in shoot tissues. T gallica showed higher resistance to both Hg and As than P. lentiscus, as well accumulating more As and Hg. (C) 2009 Elsevier Inc. All rights reserved.
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